Astronomical Algorithms - Jean Meeus - Published Willman-Bell, Inc.
Astronomical Formulae for Calculators - Jean Meeus - Published Willman-Bell, Inc.
Mathematical Astronomy Morsels – Jean Meeus – Published Willman-Bell, Inc.
Horoscope Calculation - J.A.Eshelman - Published American Federation of Astrologers, Inc.
Planetary Programs and Tables from -4000 to +2800 - P.Bretagnon & J-L.Simon - Published Willman-Bell, Inc.
